Despite the extensive literature in the relationship between firms’ voluntary financial disclosure and securities litigation risk or vice versa, it remains underexplored whether voluntary non-financial disclosure increases or decreases litigation risk. This paper documents that both the issuance and level of firms’ corporate social responsibility (CSR) disclosure are associated with a higher likelihood and intensity of subsequent CSR-related lawsuits. Moreover, the association is more pronounced for quantitative CSR disclosures compared to qualitative ones. We make causal inferences by leveraging mandatory CSR disclosure for ADR firms, CSR rating coverage expansion, the staggered adoption of the industry-level provisional SASB standards for voluntary CSR disclosure, and the reduction of industry-level tariff, creating exogenous variations in firms' voluntary CSR disclosure. The results are robust to alternative specifications, samples, and outcome variables. Further analysis indicates that higher CSR information transparency, stronger CSR commitment, and better CSR performance can attenuate the positive relation. Additionally, we provide supplementary evidence that CSR disclosure also incur real costs for both firms and their managers. Overall, our findings shed new light on a major cost concern associated with CSR disclosure and further identify firm characteristics that may reduce such concerns.